How you do code a scan for a Harami cross  

followed the next day be a gap up/ gap down?

Thanks

The Condition Formula given in the Boolean PCFs for Candlestick Patterns topic for a Harami Cross is as follows.

ABS(C1 - O1) > .5 * (H1 - L1) AND C1 < O1 AND H < O1 AND L > C1 AND (C + O) / 2 - L > .4 * (H - L) AND (C + O) / 2 - L < .6 * (H - L) AND ABS(C - O) < .2 * (H - L)

You would need to convert this to a version from 1 bar ago.

ABS(C2 - O2) > .5 * (H2 - L2) AND C2 < O2 AND H1 < O2 AND L1 > C2 AND (C1 + O1) / 2 - L1 > .4 * (H1 - L1) AND (C1 + O1) / 2 - L1 < .6 * (H1 - L1) AND ABS(C1 - O1) < .2 * (H1 - L1)

And then add code for the current bar being a gap or or gap down (the following assumes a gap means no overlap at all between the two bars.

(L > H1 OR H < L1) AND ABS(C2 - O2) > .5 * (H2 - L2) AND C2 < O2 AND H1 < O2 AND L1 > C2 AND (C1 + O1) / 2 - L1 > .4 * (H1 - L1) AND (C1 + O1) / 2 - L1 < .6 * (H1 - L1) AND ABS(C1 - O1) < .2 * (H1 - L1)

Thanks

You're welcome.